| 摘要 |
A vehicle cowl box structure is provided basically with an air inlet, an air outlet, an air passageway and a flow restriction device. The air inlet is arranged to receive outside air. The air outlet is arranged to convey the outside air to a vehicle HVAC system. The air passageway extends between the air inlet and the air outlet to convey the outside air from the air inlet to the air outlet. The flow restriction device is disposed in the air passageway at a point between the air inlet and the air outlet. The flow restriction device is configured and arranged to automatically decrease airflow from the air inlet to the air outlet as the airflow through the air inlet increases.
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